<template>
    <div>

        <div id="slider" class="mui-slider">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<a :class="['mui-control-item', item.id==0 ? 'mui-active' : '']" v-for="item in cates" 
                        :key="item.id" @tap="getPhotoListByCateId(item.id)">
							{{item.title}}
						</a>
						
					</div>
				</div>
			</div>

        <ul class="photo-list">
            <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/' +item.id" tag="li"> 
                <img v-lazy="item.img_url">
                <div class="info">
                    <h1 class="info-title">{{item.title}}</h1>
                    <div class="info-zhaiyao">{{item.zhaiyao}}</div>
                </div>

            </router-link>
        </ul>


    </div>
</template>

<script>
import mui from '../../lib/mui/js/mui.min.js'
//初始化scroll控件：'caller', 'callee', and 'arguments' properties may not be 
//accessed on strict mode functions or the arguments objects for calls to them
//报错。要关闭webpack的严格模式


export default {
    data(){
        return{
            cates:[],
            list:[]
        }
    },
    created(){
        this.getCategory(),
        this.getPhotoListByCateId(0)
    },
    mounted(){//当组件中的DOM结构被渲染好并放到页面中，会执行这个钩子函数，要想操作元素，应该在mounted，这时元素是最新的
        mui('.mui-scroll-wrapper').scroll({//初始化scroll控件：
	        deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
        });
    },
    methods:{
        getCategory(){
            this.$http.get("api/getimgcategory").then(result=>{
                if(result.body.status===0){
                    result.body.message.unshift({title:'全部',id:0})
                    this.cates=result.body.message
                }
            })
        },
        getPhotoListByCateId(cateId){
            this.$http.get('api/getimages/'+cateId).then(result=>{
                if(result.body.status===0){
                    this.list=result.body.message
                }
            })
        }
    }
}
</script>

<style lang="scss" scoped>
*{
    touch-action: pan-y;
}

.photo-list{
    padding: 0;
    margin: 10px;
    padding-bottom: 0;
    li{
        list-style-type: none;
        // background-color: #ccc;
        text-align: center;
        padding-bottom: 10px;
        box-shadow: 0 0 9px #999;
        position: relative;
        img{
            width: 100%;
            vertical-align: middle;
        }
        img[lazy=loading] 
        {
            width: 40px;
            height: 300px;
            margin: auto;
        }
        .info{
            color: #fff;
            text-align: left;
            position: absolute;
            bottom: 6px;
            background-color: rgba(0, 0, 0, 0.4);
            max-height: 84px;
            .info-title{
                font-size: 14px;

            }
            .info-zhaiyao{
                font-size: 13px;

            }
        }
    }
}

</style>